2112212143 has 4 divisors (see below), whose sum is σ = 2112607768. Its totient is φ = 2111816520.

The previous prime is 2112212131. The next prime is 2112212171. The reversal of 2112212143 is 3412122112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112212143 is a prime.

It is a super-2 number, since 2×2112212143² = 8922880274073304898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112212143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112212173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189693 + ... + 200518.

It is an arithmetic number, because the mean of its divisors is an integer number (528151942).

Almost surely, 2^2112212143 is an apocalyptic number.

2112212143 is a deficient number, since it is larger than the sum of its proper divisors (395625).

2112212143 is an equidigital number, since it uses as much as digits as its factorization.

2112212143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395624.

The product of its digits is 192, while the sum is 19.

The square root of 2112212143 is about 45958.8091991078. The cubic root of 2112212143 is about 1283.0566886381.

Adding to 2112212143 its reverse (3412122112), we get a palindrome (5524334255).

The spelling of 2112212143 in words is "two billion, one hundred twelve million, two hundred twelve thousand, one hundred forty-three".